WO2015016030A1

WO2015016030A1 - Pressure reduction-absorbing bottle

Info

Publication number: WO2015016030A1
Application number: PCT/JP2014/068437
Authority: WO
Inventors: 松尾　宣典
Original assignee: 株式会社吉野工業所
Priority date: 2013-07-31
Filing date: 2014-07-10
Publication date: 2015-02-05
Also published as: JP2015030466A; US20160176604A1; EP3028951B1; CA2919446A1; CN105452112A; EP3028951A4; EP3028951A1; CA2919446C; CN105452112B; US9834358B2

Abstract

A pressure reduction-absorbing bottle (1) is provided with a cylindrical shoulder section (12), a cylindrical body section (13) which continues to the lower end of the shoulder section, and a closed-end cylindrical bottom section (14) which continues to the lower end of the body section. The bottom section is provided with a heel section (41) which is connected to the lower end opening of the body section, and a bottom wall section (43) which closes the lower end opening of the heel section. The bottom wall section is provided with a ground contact section (42), a raised peripheral wall section (61), a movable wall section (62), and a depressed peripheral wall section (63). In order to enable the depressed peripheral wall section to move vertically, the movable wall section is provided so as to be pivotable about the connection portion (65a) where the raised peripheral wall section and the movable wall section are connected. The body section is provided with a straight cylinder section (21) which continues to the lower end of the shoulder section and which extends downward. The outer diameter of the straight cylinder section is greater than or equal to 0.60 times the outer diameter of the heel section and less than 1 time the outer diameter of the heel section.

Description

Vacuum absorption bottle

The present invention relates to a vacuum absorbing bottle.
This application claims priority based on Japanese Patent Application No. 2013-159077 for which it applied to Japan on July 31, 2013, and uses the content here.

Conventionally, a bottle formed of a synthetic resin material into a bottomed cylindrical shape has been proposed (see, for example, Patent Document 1). The bottom wall portion of the bottom of the bottle has a grounding portion located at the outer peripheral edge thereof, a rising peripheral wall portion extending from the inside in the radial direction to the grounding portion and extending upward, and a diameter from the upper end portion of the rising peripheral wall portion. An annular movable wall portion extending inward in the direction, and a depressed peripheral wall portion extending upward from a radially inner end portion of the movable wall portion. Moreover, the pressure reduction in a bottle can be absorbed by rotating a movable wall part centering on the connection part with a standing | starting surrounding wall part so that a depression surrounding wall part may be moved upwards.

In such a bottle, for example, in order to improve the appearance quality or appearance, or to make it easier to grip the barrel, the barrel may have a smaller diameter than the bottom.

International Publication No. 2010/061758

However, if the body portion of the conventional bottle has a small diameter, the volume of the body portion of the bottle becomes small, and the reduced pressure absorption in the bottle may not be performed efficiently.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a bottle in which the body portion has a diameter smaller than that of the heel portion (bottom portion) while maintaining appropriate decompression absorption performance in the bottle.

The present invention employs the following means in order to solve the above problems. That is, the reduced pressure absorption bottle according to the first aspect of the present invention includes a cylindrical shoulder, a cylindrical trunk connected to the lower end of the shoulder, and a bottomed cylindrical bottom continuous to the lower end of the trunk. . The bottom portion includes a heel portion having an upper end opening connected to a lower end opening of the trunk portion, and a bottom wall portion closing the lower end opening of the heel portion. The bottom wall portion has a grounding portion located at an outer peripheral edge of the bottom wall portion, a rising peripheral wall portion that extends from the inside in the radial direction to the grounding portion and extends upward, and a diameter from an upper end portion of the rising peripheral wall portion. An annular movable wall portion extending inward in the direction, and a depressed peripheral wall portion extending upward from a radially inner end portion of the movable wall portion. The movable wall portion is disposed so as to be rotatable about a connection portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion in the vertical direction. The trunk portion includes a straight tube portion that continues to the lower end of the shoulder portion and extends downward. Moreover, the outer diameter of the said straight cylinder part is 0.60 time or more and less than 1 time of the outer diameter of the said heel part.

In this case, by making the outer diameter of the straight tube portion smaller than the outer diameter of the heel portion, the appearance of the bottle can be improved, and the center of gravity of the bottle can be lowered to make the bottle stable and independent. it can. In addition, by making the outer diameter of the straight cylinder part 0.60 times or more the outer diameter of the heel part, a sufficient volume in the body of the bottle can be secured, and appropriate vacuum absorption performance in the bottle can be maintained. Thus, the vacuum absorption of the bottle can be performed stably. Thereby, the external appearance of a bottle can be improved, maintaining the suitable pressure reduction absorption performance in a bottle.

According to a second aspect of the present invention, in the vacuum absorption bottle according to the first aspect, a panel portion that is recessed toward a radially inner side of the trunk portion is spaced apart in the circumferential direction in the trunk portion. Two or more are formed, and the space between the panel portions adjacent in the circumferential direction is a column portion. The panel portion includes a panel bottom wall portion positioned on the inner side in the radial direction, and a side wall portion extending from the outer peripheral edge of the panel bottom wall portion toward the outer side in the radial direction. The panel bottom wall is formed with a rib that protrudes outward in the radial direction with a gap between the side wall and the vertical side wall that intersects the circumferential direction.
In the second aspect of the present invention, the rigidity of the body portion is increased by providing the panel portion on the body portion. Thereby, it becomes easy for a movable wall part to move a depression surrounding wall part upward, and decompression absorption can be performed by both a trunk | drum and a bottom part.
Moreover, since the rib part is arrange | positioned in the panel bottom wall part, the label attached so that a panel part may be covered can be supported from the inner side of radial direction. Therefore, at the time of label mounting, the label covering the trunk portion is restricted from moving inward in the radial direction, and the label can be kept smooth. In other words, the label can be held along one circumferential line in the bottle circumferential direction. Thereby, it can suppress that a label is drawn inside a clearance gap (between a pair of opposing vertical side wall parts), and a wrinkle generate | occur | produces in a label, and can suppress that the external appearance quality of a label falls.
In addition, since two or more panel portions are formed in the circumferential direction, four or more gaps between the rib portions and the vertical side wall portions are formed in the circumferential direction. Thereby, the diameter of the trunk can be reduced while narrowing the gap in the circumferential direction, and sufficient vacuum absorption performance can be imparted not only to the bottom but also to the trunk. As a result, when the bottle is decompressed, the body part is prevented from being deformed by urging to form a corner part, and the appearance of the label can be reliably kept good.

According to a third aspect of the present invention, in the vacuum absorbing bottle according to the second aspect, the rib portion is formed over the entire length of the panel bottom wall portion in the bottle axial direction.
In the third aspect of the present invention, since the rib portion is formed in the entire vertical direction of the panel bottom wall portion, the rib portion is connected to a region other than the panel portion formation region in the trunk portion. Therefore, the label can be supported in the entire vertical direction at the portion where the label and the rib portion overlap when viewed from the radial direction. Thereby, it can suppress reliably that wrinkles generate | occur | produce in a label. Furthermore, the wide support area of the label in the trunk portion can be ensured by the rib portion and the column portion, and it is possible to reliably suppress deterioration in the appearance quality of the label.

In the fourth aspect of the present invention, in the reduced pressure absorption bottle according to the second or third aspect, the outer surface of the top wall portion of the rib portion has a plurality of outer surfaces in a cross-sectional view along the radial direction of the trunk portion. It is located on the virtual circle which connects the outer surface of the top part located in the diameter direction outside of the pillar part along the peripheral direction.
In the fourth aspect of the present invention, the outer surface of the top wall portion of the rib portion is located on a virtual circle that connects the outer surfaces of the top portions located radially outside the plurality of column portions along the circumferential direction. The label can be held so as to be surely along the virtual circle. Therefore, a smooth peripheral surface of the label along the bottle circumferential direction can be formed.

According to a fifth aspect of the present invention, in the reduced pressure absorption bottle according to any one of the first to fourth aspects, the body portion extends downward from a lower end of the straight tube portion and the heel portion. The lower body part is connected to the upper end of the lower body part, and the outer diameter of the lower body part expands downward.
In the fifth aspect of the present invention, the outer diameter of the lower body part that connects the straight tube part and the heel part increases toward the lower side, so that the appearance of the body part can be further improved. The blow moldability of the body part is improved. In addition, since the lower barrel part smoothly connects the straight cylinder part and the heel part having different outer diameters, it becomes easier for the user to grip the trunk part, and moreover, wrinkles occur on the label attached to the straight cylinder part. It can be reliably suppressed.

According to the bottle of the present invention, by making the outer diameter of the straight tube portion smaller than the outer diameter of the heel portion, the appearance of the bottle and the stability of self-supporting are improved. Further, by setting the outer diameter of the straight tube portion to 0.60 times or more of the outer diameter of the heel portion, it is possible to maintain an appropriate reduced pressure absorption performance in the bottle and stably perform the reduced pressure absorption of the bottle.

It is a side view which shows the bottle in one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is a bottom view which shows the bottle of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3.

Hereinafter, an embodiment of the bottle according to the present invention will be described with reference to the drawings. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.

For example, as shown in FIG. 1, the bottle 1 (depressurized absorption bottle) in this embodiment includes a cylindrical mouth portion 11, a cylindrical shoulder portion 12, a cylindrical body portion 13, and a bottomed cylindrical bottom portion 14. I have. The mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion 14 have a schematic configuration in which their respective central axes are located on a common axis and are connected in this order. Hereinafter, this common axis is referred to as the bottle axis O. In FIG. 1, the mouth 11 side along the bottle axis O is the upper side, the bottom 14 side is the lower side, the direction perpendicular to the bottle axis O is the radial direction, and the bottle axis O The direction that circulates at is the circumferential direction.
The bottle 1 is formed by blow molding (for example, biaxial stretch blow molding) a preform formed integrally with a synthetic resin material and formed into a bottomed cylindrical shape by injection molding. Moreover, the internal volume of the bottle 1 of this embodiment is 150 ml or more and 1000 ml or less, for example.

A cap 15 is attached to the mouth portion 11.
The shoulder portion 12 is connected to the lower end of the mouth portion 11 and extends downward, and its outer diameter increases as it goes downward.
The trunk portion 13 is connected to the lower end of the shoulder portion 12 and extends downward. Further, the body portion 13 includes a cylindrical straight tube portion 21 that extends to the lower end of the shoulder portion and extends downward, and a lower body portion 22 that is continuous to the lower end of the straight tube portion 21 and extends downward. Have.

The outer diameter of the straight tube portion 21 is substantially constant over the vertical direction. Further, a label such as a shrink label (not shown) is wound around the straight tube portion 21. The shrink label is formed in a cylindrical shape using a heat-shrinkable resin film or the like, and is in close contact with the outer surface of the straight tube portion 21 by heat shrinking. Therefore, in order to prevent wrinkles or the like on the shrink label after mounting, it is necessary to appropriately support the label from the inside in the bottle radial direction.
As shown in FIGS. 1 and 2, a plurality of (5 in the present embodiment) decompression-absorbing panel portions 31 that are recessed toward the inside in the radial direction are formed in the straight tube portion 21 at intervals in the circumferential direction. Has been. Moreover, in the straight cylinder part 21, the part located between the panel parts 31 adjacent in the circumferential direction comprises the pillar part 32 extended in an up-down direction. In other words, the panel portion 31 and the column portion 32 are alternately arranged in the circumferential direction in the straight tube portion 21. In addition, the panel part 31 is extended along the up-down direction in the part except the both ends of the straight cylinder part 21 in the up-down direction.

The panel portion 31 has a panel bottom wall portion 33 located radially inside with respect to the outer peripheral surface of the body portion 13 (for example, a top portion 32a of a column portion 32 described later), and a radial direction from the outer peripheral edge of the panel bottom wall portion 33. And a side wall portion 34 that extends toward the outside.

As shown in FIG. 2, the pair of vertical side walls 34a that are connected to both ends in the circumferential direction of the panel bottom wall 33 of the side wall 34 and extend in the vertical direction (that is, intersect with the circumferential direction of the bottle) As it goes from the outer side to the outer side, it is inclined toward the outer side in the circumferential direction (the direction in which the pair of vertical side wall parts 34a facing each other within one panel part 31 are separated from each other). Note that the vertical side wall portion 34a may be configured to extend along the radial direction without being inclined. Moreover, the column part 32 located between the vertical side wall parts 34a of the panel part 31 adjacent in the circumferential direction is formed in the rectangular shape or trapezoid shape by the cross-sectional view orthogonal to the bottle axis | shaft O. As shown in FIG. Further, the top portion 32 a located on the radially outer side of the column portion 32 is formed in a curved shape protruding outward in the radial direction, and serves as the maximum outer diameter portion of the straight tube portion 21.
On the other hand, the pair of lateral side wall portions 34b that are positioned at both ends in the vertical direction in the side wall portion 34 and extend in the circumferential direction are arranged so that the outer side in the vertical direction (the vertical intermediate position of the straight tube portion 21) increases from the inner side to the outer side in the radial direction. It is set as the inclined surface which inclines toward (the direction away from).

As shown in FIGS. 1 and 2, a vertical rib portion (rib portion) 35 that protrudes outward in the radial direction is formed in the center portion of the panel bottom wall portion 33 in the circumferential direction. The vertical rib portion 35 is disposed between the pair of vertical side wall portions 34 a constituting the same panel portion 31 with a gap 36 in the circumferential direction with respect to the vertical side wall portion 34 a, and the panel bottom wall portion 33. Is formed over the entire length in the vertical direction. That is, the vertical rib portion 35 is connected to both ends in the vertical direction of the straight tube portion 21. Therefore, the panel portion 31 has a pair of lateral side wall portions 34b facing each other in the vertical direction at the center portion in the circumferential direction, and is bridged by the vertical rib portions 35. However, it becomes a pair of clearance gap 36 extended along an up-down direction. In this case, the gap 36 is located between the circumferential outer end of the panel portion 31 and the circumferential outer end of the vertical rib portion 35, and two gaps 36 are provided in each panel portion 31. Therefore, in this embodiment, since the five panel parts 31 are provided in the straight cylinder part 21, a total of ten gaps 36 are arranged at intervals in the circumferential direction.
In addition, although the vertical rib part 35 of this embodiment is formed over the full length of the up-down direction in the panel bottom wall part 33, this invention is not limited to this, Between the vertical rib part 35 and the horizontal side wall part 34b. A gap may be formed. In other words, the vertical rib portions 35 extending in the vertical direction may not be connected to both ends in the vertical direction of the straight tube portion 21.

The vertical rib portion 35 has a top wall portion 35 a located radially outside the panel bottom wall portion 33, and a peripheral end wall portion 35 b that connects the outer end in the circumferential direction of the top wall portion 35 a and the panel bottom wall portion 33. And formed by.
As shown in FIG. 2, the top wall portion 35 a is formed in a curved shape that protrudes outward in the radial direction in a cross-sectional view along the radial direction. The top wall portion 35 a is substantially located on a virtual circle L (on the circumference of the virtual circle L) extending in the circumferential direction following the surface shape of each top portion 32 a of the plurality of column portions 32, and is the maximum of the straight cylinder portion 21. It is an outer diameter part.
The present invention is not limited to this, and the top wall portion 35a may be arranged at a position different from the circumference of the virtual circle L extending in the circumferential direction following the surface shape of the plurality of top portions 32a. However, in this case, it is preferable that the top wall portion 35a is disposed at a position where the label (shrink label) attached to the straight tube portion 21 can be appropriately supported from the radially inner side together with the top portion 32a.

As shown in FIGS. 1 and 2, the peripheral end wall portion 35b is positioned at both ends in the circumferential direction of the vertical rib portion 35 and extends in the vertical direction. The peripheral end wall portion 35b is inclined in a direction away from each other. Therefore, the longitudinal rib portion 35 is formed in a trapezoidal shape in which the width in the circumferential direction gradually increases from the outer side in the radial direction toward the inner side in a cross-sectional view along the radial direction.
Furthermore, each of the column part 32 and the vertical rib part 35 is arrange | positioned line-symmetrically with respect to the centerline extended in the radial direction through the center of the circumferential direction. That is, the positions along the radial direction of the inner ends in the radial direction in the pair of peripheral end wall portions 35b constituting the same vertical rib portion 35 are equal to each other, and the pair of vertical side walls constituting the same column portion 32 Of the portion 34a and the peripheral end wall portion 35b, the longitudinal side wall portion 34a has a shorter radial length than the peripheral end wall portion 35b.

The connection part 37 in the panel part 31 has connected the radial inner end in the vertical side wall part 34a, and the radial inner end in the surrounding end wall part 35b mutually. Specifically, the connecting portion 37 has a circumferential inner side (a direction in which the pair of vertical side wall portions 34a in one panel portion 31 approach each other as it goes from the outer side in the radial direction to the inner side in a cross-sectional view along the radial direction. ). The gap 36 is formed by the vertical side wall portion 34a, the horizontal side wall portion 34b, the connection portion 37, and the peripheral end wall portion 35b.
Further, both the vertical side wall portion 34a and the connection portion 37 are inclined toward the outer side in the circumferential direction from the inner side in the radial direction to the outer side (the direction in which the pair of vertical side wall portions 34a in one panel portion 31 are separated from each other). However, the inclination angles are different from each other. As shown in FIG. 2, the angle formed between the vertical side wall portion 34a and the circumferential line extending in the circumferential direction is set larger than the angle formed between the connection portion 37 and the circumferential line. Has been. In other words, the outer end portion (the end portion near the column portion 32) in the circumferential direction of the connection portion 37 has a diameter of the vertical side wall portion 34a via a bent portion that bends outward from the end portion in the radial direction. It is connected to the inner end of the direction.
When the inside of the bottle 1 is depressurized, a radially inward force acts on the longitudinal rib portion 35, and this force also acts on the connecting portion 37 connected to the longitudinal rib portion 35 (circumferential end wall portion 35b). It is transmitted. Since the connection portion 37 is connected to the vertical side wall portion 34a via the bent portion, an angle between the connection portion 37 and the vertical side wall portion 34a (angle on the outer side in the radial direction) is applied when the force is applied. So that the connecting portion 37 is displaced. In other words, when the force is applied, the connection portion 37 is displaced so that the connection portion 37 and the vertical side wall portion 34a are aligned. Since the connection portion 37 and the vertical side wall portion 34a are connected via the bent portion, the connection portion 37 can be easily displaced when a force during decompression is applied. The supported longitudinal rib portion 35 can be appropriately moved radially inward. That is, the panel part 31 can be configured as a secondary reduced pressure absorption part after the bottom wall part 43 (movable wall part 62) described later.

The inner diameter and the outer diameter of the lower body portion 22 are gradually enlarged toward the lower side, and a first annular groove 38 is formed over the entire circumference at a connection portion between the lower body portion 22 and the straight tube portion 21. Yes.

As shown in FIGS. 1 and 4, the bottom portion 14 has a cylindrical heel portion 41 whose upper end opening portion is connected to the lower end opening portion of the trunk portion 13, and closes the lower end opening portion of the heel portion 41. And a bottom wall portion 43 having a peripheral edge portion as a ground contact portion 42.
The heel portion 41 includes a lower heel portion 51 that is continuous with the ground contact portion 42 from the outside in the radial direction, and an upper heel portion 52 that is continuous with the trunk portion 13 from below. In the present embodiment, the outer diameter D2 of the heel portion 41 is not less than 0.60 times and less than one time the outer diameter D1 of the straight tube portion 21.

The outer diameters of the lower heel portion 51 and the upper heel portion 52 are the same, and the lower heel portion 51 and the upper heel portion 52 are the maximum outer diameter portions of the bottle 1. The outer diameter of the lower heel portion 51 and the upper heel portion 52 is such that the outer diameter of the portion constituting the maximum outer diameter portion of the heel portion 41 is 0.60 times or more and less than one time the outer diameter D1 of the straight tube portion 21. As long as they are different. In addition, a second annular groove 53 is formed over the entire circumference at a connection portion between the lower heel portion 51 and the upper heel portion 52.

As shown in FIGS. 3 and 4, the bottom wall portion 43 is connected to the grounding portion 42 from the inside in the radial direction and extends upward, and from the upper end portion of the rising peripheral wall portion 61 to the inside in the radial direction. An annular movable wall 62 projecting toward the upper side, a depressed peripheral wall 63 extending upward from the radially inner end of the movable wall 62, and a ceiling wall 64 connected to the upper end of the depressed peripheral wall 63. Have.

As shown in FIG. 4, the rising peripheral wall portion 61 is gradually reduced in diameter from the bottom to the top. Moreover, as shown in FIG.3 and FIG.4, the uneven | corrugated | grooved part 61a is formed in the standing surrounding wall part 61 over the perimeter. The concavo-convex portion 61a has a configuration in which a plurality of protruding portions 61b that protrude inward in the radial direction and are formed in a curved shape are disposed at intervals in the circumferential direction.

The movable wall portion 62 is formed in a curved shape protruding downward, and gradually extends downward from the outside in the radial direction toward the inside. The movable wall portion 62 and the rising peripheral wall portion 61 are connected via a first curved surface portion 65a that protrudes upward. The movable wall portion 62 is rotatable about the first curved surface portion 65a (which is a connecting portion with the rising peripheral wall portion 61) so as to move the depressed peripheral wall portion 63 upward.
Further, as shown in FIG. 3, a plurality of bottom rib portions 66 are radially arranged around the bottle axis O on the movable wall portion 62. The bottom rib portion 66 has a configuration in which a plurality of concave portions 66a that are recessed in a curved shape upward are intermittently disposed along the radial direction.

As shown in FIGS. 3 and 4, the depressed peripheral wall portion 63 is disposed coaxially with the bottle axis O, and is formed in a multistage cylindrical shape that gradually increases in diameter from the upper side toward the lower side. Specifically, the depressed peripheral wall portion 63 includes a lower cylindrical portion 67 that is gradually reduced in diameter from the radially inner end portion of the movable wall portion 62 and a lower portion from the outer peripheral edge portion of the top wall portion 64. The diameter is gradually increased as it goes, and includes an upper cylindrical portion 68 having a smaller diameter than the lower cylindrical portion 67 and a stepped portion 69 that connects the lower cylindrical portion 67 and the upper cylindrical portion 68.

The lower cylinder portion 67 is connected to the radially inner end portion of the movable wall portion 62 via a second curved surface portion 65b that protrudes downward. The second curved surface portion 65b protrudes obliquely downward toward the inside in the radial direction. Moreover, the lower cylinder part 67 is formed in the circular shape by the cross-sectional view along radial direction.
A plurality of projecting portions 68a projecting inward in the radial direction are formed on the upper cylindrical portion 68 at intervals in the circumferential direction. The overhanging portion 68a is formed in a curved shape that protrudes outward in the radial direction when viewed from the bottom. An end portion on the radially outer side of the overhang portion 68 a is continuous with the step portion 69. Further, as shown in FIG. 4, the overhanging portion 68 a is formed in a curved surface shape that protrudes inward in the radial direction in a longitudinal sectional view along the bottle axis O direction. Further, as shown in FIG. 3, the portion 68b between the adjacent overhang portions 68a is formed in a curved surface protruding outward in the radial direction in the bottom view, and the overhang portions 68a adjacent in the circumferential direction are formed. The end portions along the circumferential direction are connected to each other. As shown in FIGS. 3 and 4, the overhanging portion 68 a and the interposition portion 68 b are formed such that the portion 68 b between the overhanging portions 68 a adjacent in the circumferential direction is a square portion (vertex portion) and the overhanging portion 68 a is a side. A polygonal cylindrical portion 68c having a polygonal shape (regular triangular cylindrical shape) is formed.

The stepped portion 69 is formed in a concave curved shape that is recessed outward in the radial direction. The step portion 69 is located above the upper end portion of the rising peripheral wall portion 61 or at an equivalent height.

The top wall portion 64 has a circular shape in a plan view arranged coaxially with the bottle axis O, and the top wall portion 64 and the depressed peripheral wall portion 63 have a bottomed cylindrical shape as a whole.

In the bottle 1 having such a configuration, when the inside of the bottle 1 is depressurized, the movable wall portion 62 rotates around the first curved surface portion 65a that is a connecting portion with the rising peripheral wall portion 61 at the bottom portion 14 of the bottle 1. The depressed peripheral wall 63 is moved upward. Further, the body portion 13 undergoes a diameter reduction deformation while narrowing a gap 36 between the column portion 32 and the vertical rib portion 35 in the circumferential direction. Thereby, both the bottom part 14 and the trunk | drum 13 absorb the pressure reduction in the bottle 1. FIG.

According to the bottle 1 having the above-described configuration, by maintaining the outer diameter of the straight tube portion 21 at least 0.60 times and less than one times the outer diameter of the heel portion 41, an appropriate reduced pressure absorption performance within the bottle 1 is maintained. However, the appearance quality or appearance of the bottle 1 can be improved, and the stability of the bottle 1 can be improved.
Moreover, the rigidity of the trunk | drum 13 can be improved by providing the panel part 31 in the trunk | drum 13. FIG. As a result, the movable wall portion 62 can easily move the depressed peripheral wall portion 63 upward, so that reduced pressure absorption is performed in both the body portion 13 and the bottom portion 14. In addition, since the rigidity of the trunk | drum 13 is improving, the decompression absorption can be performed in the bottom part 14 and the decompression absorption can be secondarily performed in the trunk | drum 13 at the time of pressure reduction of a bottle. Moreover, since the vertical rib part 35 is arrange | positioned in the panel bottom wall part 33 and the label attached to the panel part 31 is supported, it can suppress that a label | wrinkle generate | occur | produces on a label by keeping a label smooth. Thereby, it can suppress reliably that the external appearance quality of a label falls.
Furthermore, since 2 or more and 5 or less panel parts 31 are formed, sufficient vacuum absorption performance is imparted to the body part 13, and the appearance of the label can be more reliably kept good.
Moreover, since the straight cylinder part 21 and the heel part 41 are connected by the lower trunk | drum 22, the external appearance of the trunk | drum 13 can be improved further and the blow moldability of the trunk | drum 13 improves.

The inventor of the present application verified how the ratio of the outer diameter D1 of the straight tube portion 21 and the outer diameter D2 of the heel portion 41 changes with respect to the reduced pressure absorption performance of the bottle 1.
Hereinafter, the sample bottle used in this verification will be described. In addition, the shape and thickness of the bottom part 14 of all the samples are made the same. The outer diameter D1 of the straight tube portion 21 is different between the sample 1 and the samples 2 and 3, and the number of the panel portions 31 is different between the sample 1 and the samples 4 to 6. In Table 1, the absorption capacity is a numerical value indicating the capacity immediately before the bottle shape cannot be maintained due to crushing or dents when the inside of the bottle is decompressed.

As shown in Table 1, by making the outer diameter D1 of the straight tube portion 21 smaller than the outer diameter D2 of the heel portion 41, the outer diameter D1 is equal to the outer diameter D2 (D1 / D2 = 1, sample 2). Although the absorption capacity is smaller than the case, it can be seen that the reduced pressure strength increases.
It can be seen that the absorption capacity of the bottom portion 14 is almost equal because the shape and thickness of the bottom portion 14 are the same. However, it can be seen that the absorption capacity of the entire bottle 1 is increased because the movable wall portion 62 of the bottom portion 14 becomes easier to move the depressed peripheral wall portion 63 upward as the decompression strength of the body portion 13 is stronger. Moreover, since the panel part 31 is provided in the trunk | drum 13, the rigidity of the trunk | drum 13 increases and it can absorb pressure reduction by both the trunk | drum 13 and the bottom part 14. FIG.

It can also be seen that the absorption capacity decreases as the outer diameter D1 of the straight tube portion 21 decreases, and the absorption capacity decreases as the number of panel portions 31 decreases. There is no significant difference between the number of panels 31 and the absorption capacity between the number of panels 5 and 4, but when the number of panels is reduced to 3, the absorption capacity decreases by 14.3% and the number of panels becomes 2. It decreases by 20.4%. However, sufficient absorption capacity is ensured. Therefore, the deformation occurred slightly in the upper part of the column part 32 for the samples 1, 2, and 4 and in the lower body part 22 for the samples 3 to 5, but since the bottle 1 has a sufficient absorption capacity, the bottle 1 It was found that the reduced pressure generated in was sufficiently absorbed.
When the outer diameter D1 of the straight tube portion 21 is, for example, 34.0 mm or less and the ratio between the outer diameter D1 of the straight tube portion 21 and the outer diameter D2 of the heel portion 41 is less than 0.60, the blow molding of the bottle 1 is performed. The sex was low.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, the outer diameters of the straight tube portion and the heel portion may be appropriately changed as long as the ratio of the outer diameter of the straight tube portion and the outer diameter of the heel portion is in the range of 0.60 times or more and less than 1 time.
Moreover, although the panel part is formed in the part which avoided the both ends of the up-down direction among the trunk | drums, you may form over the full length of the up-down direction of a straight cylinder part.
Although one vertical rib portion is disposed on the panel bottom wall portion, a plurality of vertical rib portions may be disposed on the panel bottom wall portion with a gap.
Although the number of panel portions formed on the body portion is 2 or more and 5 or less, other numbers may be used, and the panel portions may not be formed.
The body portion may be configured to include an annular connecting portion in a plan view that connects the lower end of the straight tube portion and the upper end of the heel portion in a step shape without providing the lower body portion. For example, the connecting portion is arranged in parallel to a plane perpendicular to the bottle axis O. Further, the outer diameter of the straight tube portion does not have to be completely constant over the entire length in the vertical direction, such as slightly decreasing (for example, about 1.5 mm) as it goes downward. The synthetic resin material forming the bottle may be appropriately changed, for example, polyethylene terephthalate, polyethylene naphthalate, amorphous polyester, or a blend material thereof.
The bottle is not limited to a single layer structure, and may be a laminated structure having an intermediate layer. Examples of the intermediate layer include a layer made of a resin material having a gas barrier property, a layer made of a recycled material, or a layer made of a resin material having an oxygen absorption property.

The present invention can be applied to a bottle in which the body portion has a smaller diameter than the heel portion while maintaining an appropriate reduced pressure absorption performance in the bottle.

DESCRIPTION OF SYMBOLS 1 Bottle 11 Mouth part 12 Shoulder part 13 Body part 14 Bottom part 21 Direct cylinder part 22 Lower trunk part 31 Panel part 32 Column part 32a Top part 33 Panel bottom wall part 34 Side wall part 34a Vertical side wall part 35 Vertical rib part (rib part)
35a Top wall part 36 Crevice 41 Heel part 42 Grounding part 43 Bottom wall part 61 Standing peripheral wall part 62 Movable wall part 63 Depressed peripheral wall part L Virtual circle O Bottle shaft

Claims

A cylindrical shoulder, a cylindrical trunk continuous to the lower end of the shoulder, and a bottomed cylindrical bottom continuous to the lower end of the trunk;
The bottom is
A heel portion having an upper end opening connected to a lower end opening of the body portion, and a bottom wall portion closing the lower end opening of the heel portion,
The bottom wall portion is
A grounding portion located at an outer peripheral edge of the bottom wall;
A rising peripheral wall portion extending from the inside in the radial direction to the grounding portion and extending upward;
An annular movable wall portion extending radially inward from an upper end portion of the rising peripheral wall portion;
A depressed peripheral wall portion extending upward from a radially inner end portion of the movable wall portion,
The movable wall portion is disposed so as to be rotatable around a connection portion with the rising peripheral wall portion so as to move the depressed peripheral wall portion in the vertical direction,
The trunk portion includes a straight tube portion that extends downward while continuing to the lower end of the shoulder portion,
The reduced pressure absorption bottle, wherein an outer diameter of the straight tube portion is 0.60 times or more and less than 1 time an outer diameter of the heel portion.
Two or more panel portions that are recessed toward the inner side in the radial direction of the body portion are formed in the body portion at intervals in the circumferential direction, and a column portion is formed between the panel portions adjacent in the circumferential direction. ,
The panel portion includes a panel bottom wall portion located on the inner side in the radial direction, and a side wall portion extending from the outer peripheral edge of the panel bottom wall portion toward the outer side in the radial direction,
The said panel bottom wall part is formed with the rib part which protrudes toward the outer side of radial direction with a clearance gap between the vertical side wall part which cross | intersects the circumferential direction among the said side wall parts. The vacuum absorbing bottle as described.
The reduced pressure absorption bottle according to claim 2, wherein the rib portion is formed over the entire length of the bottom wall portion of the panel in the bottle axial direction.
In a cross-sectional view along the radial direction of the body portion, the outer surface of the top wall portion of the rib portion is on a virtual circle that connects the outer surfaces of the top portions located radially outside the plurality of column portions along the circumferential direction. The vacuum absorption bottle according to claim 2 or 3, which is located.
The body portion includes a lower body portion extending downward from a lower end of the straight tube portion and continuing to an upper end of the heel portion,
The reduced pressure absorption bottle according to any one of claims 1 to 4, wherein an outer diameter of the lower body portion is enlarged toward a lower side.